Oil, fuel, and air filters are used to filter out mechanical impurities in the oil, fuel, and air entering the engine, and protect the engine crankshaft connecting rod movement, the precision coupling parts of the fuel injection system, and the cylinder liner piston ring from abnormalities. Wear and tear is an important component (attachment) that enables the engine’s economic indicators, power indicators, reliability and emission indicators to function normally. With the gradual implementation of emission regulations, engine technology advancements have put forward new and higher requirements for filter products, which increasingly shows the importance of filters for engine matching.

Automobile filter paper is a special industrial technical paper specially used to make domestic mini-car air filters. It is characterized by high filtration efficiency while maintaining low airflow resistance. Generally, the filtration efficiency of domestic air filter paper is 95-98%, while that of automobile filter paper can reach more than 99.5%. Automotive filter paper is widely used in automobiles, locomotives and engineering dust removal equipment.

1. Product definition

Automobile filter paper or automobile industry filter paper is a kind of filter paper that has been coated and impregnated. It is mainly used as a high-quality filter material for filtering impurities in air, oil and fuel.
Industrial filter paper includes air filter paper, oil filter paper, fuel filter paper, etc. The weight of a gram is between 120 g/m² and 145 g/m². The filter element made of filter paper has the advantages of high filtration efficiency, low cost and light weight.

2. Development history

Many filter materials, such as felt, cotton yarn, iron wire, oil bath, etc., have basically been replaced by impregnated paper filters. With the rapid development of the automobile industry, paper as a filter material has been widely used in the world’s automobile filtration industry and has a very broad development space. In 2004, the U.S. Economic Commission listed industrial filter paper as one of the top ten potential filter papers in the world.

Since the United States invented the alcohol-soluble thermosetting phenolic resin impregnation process for automobile filter paper in 1953, it has been used as an impregnant in the conventional production process of automobile filter paper for a long time. The main advantages of the impregnation process are mature technology, good water resistance, and high hardness of the filter paper.

3. Product features and application field analysis

Automobile filter paper is one of the raw materials for the production of filter elements, which has an important influence on the economic and technical indicators, environmental protection indicators, safety indicators and service life of the engine.